#include<stdio.h>
#include<string.h>
int my_strlen(char* sb)
{
	if (*sb != '\0')
		return 1 + my_strlen(sb + 1);
	else
		return 0;
}


int main()
{
	char arr[] = "arr";
	printf("%d\n",my_strlen(arr));
	return 0;
}